Cast-iron pipe



I QM @Qwh BY Apri! 29;, 1924, 1,492,517

" J.'R. MCWANE CAST IRON PIPE Filed 00%;. 18, 1922 'Fic 4- James R.1"[2Wane INVENTOR WITNESSES 4 Patented Apr. 2%,

JAMES R. hloV-J'All'E, OF BIRMINGHAM, ALABAMA.

CAST-IRON FIFE.

Application filed Gctoher 18, 1922.

.T all whom it may concern:

Be it known that 1, JAMES R. Mel/Vans,

a citizen of the United States, residing at Birmingham, in the county of Jeflerson and a State of Alabama, have invented new and useful Improvements in Cast-Iron Pipes, of which the following is a specification.

This invention relates to cast iron pipes or tubes.

Two methods of manufacturing cast iron pipes are in vogue. One is to cast the pipe in a vertically disposed mold or flask, and theother is to cast the pipes horizontally. There are advantages in both methods, but the horizontal method seems to outweigh the other in many important respects. However, in casting pipes horizontally, it is necessary to provide chaplets for supporting the horizontal core, the chaplets having an interlocking engagement with the metal of the pipe and being molded with the same. No provision is made to seal the union between the chaplets and the body of the pipes.

To provide such a seal, my invention comi prises an integral annular flange or wall in surrounding relation to the outer end of each chaplet, said flange or wall being formed at the time the metal is poured to form the pipe, and serving to strengthen the 39 same at that point, and providing a cup or receptacle for the reception of cement, or other appropriate sealing material, for pre venting leakage from the inside around the chaplet, and for protecting the outer end of the chaplet from the corrosive action of the soil in which the pipe is laid.

A full and complete understanding of the invention may be obtained from a consider ation of the following detailed description, taken in connection with the accompanying drawing forming a part of this specification, it being understood that while the drawing shows a practical form of the invention, the latter is not confined to strict conformity with the showing thereof, but may be changed or modified, so long as such changes or modifications mark no material departure from the salient features of the invention as specifically pointed out in the appended claims.

In the drawing, in which similar reference characters designate corresponding parts throughout the several figures;

Figure 1 is a side elevation of a cast iron pipe constructed in accordance with the Serial No. 595,392.

present invention and having the improved chaplet protecting means formed thereon;

Figure 2 is a transverse sectional view thereof, taken on the line 22 of Figure 1 and drawn on an enlarged scale;

Figure 3 is a longitudinal sectional view taken on the line 33 of Figure 2;

Figure 4 is a view similar to Figure 2, but showing the cup or receptacle filled with cement or other sealing material; and

Figure 5 is a detail view of a slight modification.

The present application,which is a companion application with one filed by me on even date herewith for improvements in core, flask and coreguide for casting pipe or tube horizontally, is designed, as already stated, to cover means for protecting the outer ends of the chaplets used in the horizontal casting of pipes.

In the drawing there is shown a cast iron pipe 1 of the bell and spigot form, though, of course, the same may be of any other form or may consist of simple tubing, and the same may be assumed to be of a length wherein the core used in the formation of the same required intermediate supports to prevent its sagging or floating.

The chaplets 2 consist of short pieces of threaded or ribbed steel bar of predetermined lengths to exactly accord with the de sired thickness of the walls of the pipe. These chaplets are placed in abutting relation to the core bar, or to blocks carried thereby in alinement with and diametrically opposite each other and traversing the mold, prior to the pouring operation, the outer ends of said chaplets being supported by pins adjustably mounted and held in the sections of the flask and bearing against the outer ends of the chaplets. An annular channel is formed in the sand of the mold around the base of said pins where contacting with the outer ends of the chaplets, and when the metal is poured, the chap lets are completely embedded within the metal, the outer ends of the same being flush with the exterior wall of the pipe and located at the center of a cup or receptacle 3 formed by the inner end of the aforesaid pin, the said cup or receptacle being surrounded by an annular flange or wall 4 which is the result of the molten metal entering the aforesaid annular channel. The threads or ribs on the chaplets serve to lOO its 1 reduce leakage to a minimum by reason of the metal entering the same throughout the length of the chaplets, and to prevent the outer ends of the same from coming into contact with the soil, and thus being sub jected to the corroding or rusting action thereof, a quantity of cement or other suitable sealing material 5 is packed into the cup or receptacle and allowed to harden or set when any possible leak due to internal forces is rendered impossible.

As a further precaution against leakage, the outer ends of the chaplets may be hammered over or upset. T he cup or receptacle may be formed, as illustrated in Figure 5, wherein the inner Wall of the annular flange l is slightly undercut to, act as a retainer for the cement, or the same may be provided with a continuous groove 0r bead for the purpose.

From the foregoing it will be seen that I have provided a simple, cheaply manufactured, and easily applied means for prevent ing leakage around the chaplets, and for protecting them at their outer ends -from the action of the elements in the surrounding soil after the pipe has been laid.

What is claimed is l. A cast iron pipe having a chaplet embedded therein, said chaplet being surrounded by an integral flange on the outside of the pipe for the purpose set forth.

2. A cast iron pipe having chaplets embedded therein intermediate of the ends thereof, said ohaplets being surrounded by an integral flange on the outside of the pipe to form a cup or receptacle.

8. A cast iron pipe having chaplets embedded therein intermediate of the ends thereof, said Chaplets being surrounded by an integral flange on the outside of the pipe to form a cup or receptacle, and a protective coating applied to the receptacle and over the outer ends of said chaplets.

i. A cast iron pipe having chaplets embedded therein intermediate of the ends thereof, said Chaplets being surrounded by an integral ring on the outside of the pipe to form a cup or receptacle, and a cement coating applied to the receptacle and over the outer ends of said chaplets, said ring having its inner Wall undercut. to lock the cement coating in place for sealing the end of the chaplet and preventing leakage around the same.

In testimony that I claim the foregoing as my own, I have hereto afiixed my sig nature.

JAMES R. MoWANE. 

